body,html,div,ul,li,img,p,ol,button,input{
    margin: 0;
    padding: 0;
}
ol,ul{
    list-style:none;
}
a,u{
    text-decoration: none;
}
i,b{
    font-style: normal;
}
input,button{
    outline: none;
}
#app{
    width:100%;
    height:100%;
}


